I do not recommend an adapter, the 4-3” long thingies, to mount anything but the smallest chucks or faceplates, for small turnings. Inserts , ie converting a smaller spindle to a larger spindle size, perfectly fine. Properly fitting inserts only add ~3/8”-1/2” extension. All my chucks are the insert type so they can be fitted to other sizes.
Over time I turned similar sized/wood hf’s using faceplates and chucks. I didnt observe any difference in the turning. Eng grain hf’s get a long tenon, 1” or so. When I started with hf’s I went down the faceplate path largley due to Lyle Jamieson’s advice (I have his hollowing rig). Faceplates dont fit the way I like to process my work all the way through, because I remount pieces to sand, finish and buff. That drove me to experiment with chucks. The only issue I had was some too short tenons that let go, and they might have been a bit small in OD as well. I typically will hollow in stages, bring the ID and OD down together, and cut the tenon down once near the bottom.
I have a couple of the EWT aluminum faceplates and they do work well.